intel simple network management protocol (snmp) …intel® snmp subagent user’s guide 1...

Intel® Simple Network Management

Protocol (SNMP) Subagent v8.1

User Guide

Jan 2020

Intel® SNMP Subagent User’s Guide ii

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Intel® SNMP Subagent User’s Guide iii

Contents

Introduction 1

Getting the Latest Information ............................................................................................... 1 Platform Compatibility and System Requirements ................................................................. 1

Supported Intel® Server Platforms ................................................................................ 1 Supported Server Operating Systems .......................................................................... 1 Baseboard Management Controllers (BMC) ................................................................. 2 SNMP Master Agent ..................................................................................................... 2

Overview 3

General Architecture ............................................................................................................. 3 Baseboard SNMP Subagent ................................................................................................. 4

Installation and Configuration 5

Pre-Installation ...................................................................................................................... 5 Installation using standalone installer .................................................................................... 5

Linux*Operating System ............................................................................................... 5

Intel® SNMP Subagent Details 7

Features of the Intel® SNMP Subagent ................................................................................. 8 Accessing Sensor Data ................................................................................................ 8 Displaying System Health Status .................................................................................. 9

Intel® SNMP Subagent Configuration Files ............................................................................ 9 Linux* Operating System Configuration Files................................................................ 9

Linux* SNMP Command-Line Options................................................................................... 9 Restarting SNMP Agents .................................................................................................... 10

Linux* Operating System ............................................................................................ 10

Uninstalling the Intel® SNMP Subagent 11

Intel® SNMP Subagent User’s Guide 1

Introduction

The Intel® SNMP Subagent on managed servers allows you to communicate using Simple Network

Management Protocol (SNMP) with the baseboard SNMP Subagent on the managed server. With

the Intel® SNMP subagent, you can use SNMP TRAPs and GETs to manage supported hardware

components.

This document discusses the SNMP Subagent for the baseboard.

Getting the Latest Information

Intel® System Management Software components are frequently enhanced and updated to support

new features and platforms. In addition to enhancements, your server board may also have other

SNMP Subagents available on the Intel support website. See Intel® System Management Software

Release Notes or http://www.intel.com/go/servermanagement for the latest information.

Platform Compatibility and System Requirements

Before installing the Intel® SNMP subagent on server systems, each system must meet the

requirements described in the following sections.

Supported Intel® Server Platforms

• Multi-Core Intel® Xeon® Processor E5 Sequence-based Servers

For the latest and up-to-date list of supported operating systems, system requirements and platforms

supported refer to the release notes available with the product. (Intel® Server Systems based on the

Intel® Server Boards listed below are also supported unless otherwise noted in the product

documentation for the Intel® Server System.)

Supported Server Operating Systems

The Intel® SNMP Subagent is supported on the following operating systems:

• RHEL6*update5 (32 bit & EM64T)

• RHEL7 (EM64T)

• RHEL7.1 (EM64T)

• RHEL7.2 (EM64T)

• RHEL7.3 (EM64T)

• RHEL7.4 (EM64T)

• RHEL7.5 (EM64T)

• RHEL7.6 (EM64T)

• SLES* 11 SP4 (32 bit & EM64T)

• SLES* 12 SP1 (EM64T)

http://www.intel.com/go/servermanagement

2 Intel® SNMP Subagent User’s Guide

Supported Server Platforms

• Intel® Server Board S2600BP

• Intel® Server Board S2600WF

• Intel® Server Board S2600ST

Baseboard Management Controllers (BMC)

The Intel® SNMP Subagent is only supported on Intel® Server platforms with one of the following

baseboard management controllers:

• Intel® Integrated BMC

SNMP Master Agent

You must install the SNMP Master Agent on the managed server.

• For supported Linux* operating systems, use the Net-SNMP package.


Overview

Intel® SNMP Subagents are SNMP extension agents that provide interfaces and databases for

retrieving server hardware information and for monitoring server health status on the network using

the SNMP protocol.

The Management Information Base (MIB) file that accompanies each SNMP subagent contains the

definitions of the management information the SNMP subagent can access, with each definition

distinguished by a unique object identifier (OID). Each SNMP subagent has its own MIB file and

OID. The SNMP subagents support SNMP-based access (GETs and TRAPs) to the instrumented

components on the managed server, collecting and returning information as requested by a

management system. The subagents plug into the SNMP Master Agent infrastructure supported by

the operating system and respond to queries and sets filtered to the subagents by the master agent,

based on the OID specifying the data defined in the MIB to be retrieved.

Table 1. Intel® SNMP Subagents

Description MIB File Base OID

Baseboard

(baseboard

sensors,

processors,

memory)

subagent

Basebrd7_v5.mib iso(1) org(3) dod(6) internet(1) private(4) enterprises(1) Intel(343)

products(2) server-management(10) software(3)

baseboardGroup7(5)

For Linux* systems, the SNMP subagent is implemented as an rpm package. It is installed,

configured and started as a service. The SNMP master agent (Net-SNMP) communicates with the

subagent through AgentX protocol.

General Architecture

The Intel® SNMP subagent makes sensor, memory, and processor information on a managed server

available to SNMP-based management applications. The SNMP master agent, distributed with the

operating system, must be installed and configured before installing the baseboard SNMP subagent.


All SNMP traffic coming over the network to the managed server is received by the SNMP Master

Agent. When the Intel® SNMP Subagent initializes, it tells the SNMP Master Agent which OID

values the subagent is responsible for. These OID values correspond to the data provided in the

MIB. The SNMP-based Management Console will use the MIB to determine the OID values for

particular attributes. The SNMP Master Agent will route SNMP requests to the appropriate SNMP

subagent based on the supported OIDs. The SNMP request contains information about the

originator of the request. The SNMP subagent will process the request and send back the

information to the SNMP Master Agent, which will then send it back across the network to the

SNMP-based Management Console.

Baseboard SNMP Subagent

The baseboard SNMP subagent is described in detail in the section titled “Baseboard SNMP

Subagent Details” beginning on page 7.


Installation and Configuration

Pre-Installation

The SNMP Master Agent must be installed and configured on the managed server prior to installing

the Intel® SNMP Subagents. The Community name string and trap destinations must be configured

correctly. Once the Intel® SNMP Subagent is installed, the MIB file must be copied to any SNMP

Management Applications requiring the supported OID and attribute information.

NOTE

The Intel® SNMP Subagent is intended for use with third-party SNMP-based management clients.

For information on installing and configuring third-party SNMP-based management clients, refer

to the documentation included with the client software you intend to install.

Installation using standalone installer

• To install SNMP Subagent in Linux, run snmpsubagentinstall.sh.

Linux*Operating System

Master Agent

The Intel® SNMP Subagent works with the Net-SNMP Master Agent.

Configuration File

Since the Intel® SNMP Subagent is designed to use AgentX protocol to communicate with the

NET-SNMP Master Agent on Linux*, the snmp configuration file needs to be modified before you

can use the Intel® SNMP Subagent.

On Red Hat Linux*, for example, the /etc/snmp/snmpd.conf file for snmpd must be modified. You

need to overwrite the existing snmp.conf file with the following content then restart the Master

Agent in order for any configuration file changes to take effect.

# This line allows SNMP remote access to the subagent

rwcommunity <communityname>

# This line turns on agentx master agent support

master agentx

# This line enables V2 trap sending

trap2sink localhost <communityname>


The changes are similar for SuSE Linux*. You can view the SuSE Linux* conf file on the Intel®

System Management Software CD.

MIB File Location

After the Intel® SNMP Subagent is installed on the server, the MIB files (basebrd7_v5.mib will be

located in /usr/share/snmp/mibs and /usr/local/snmpsa/mibs on Red Hat Linux* and similar

locations on SuSE Linux*. In order to use Net-SNMP utilities such as SNMPGET on a Linux*

console to retrieve data from the SNMP subagent on a server, copy the MIB files to the Linux*

console, and run the command "export MIBS=ALL" from a terminal window to make the MIB

information available to the utilities. Note that third party SNMP-based management clients may

have specific requirements for MIB file location. Consult your client software documentation for

any such configuration requirements.


Intel® SNMP Subagent Details

Figure 1 illustrates how the Intel® SNMP Subagent interfaces with the SNMP Master Agent and the

BMC on the platform.

Figure 1. Intel® SNMP Subagent Architecture

There are two sources of information for the Intel® SNMP Subagent on the server. The Intel®

SNMP Subagent communicates with the Baseboard Management Controller (BMC) using an

Intelligent Platform Management Interface (IPMI) driver. Through the IPMI driver, the Intel®

SNMP Subagent has access to information on components such as power supplies, voltages,

temperature sensors, cooling devices, chassis intrusion sensors, and the System Event Log (SEL).

The Intel® SNMP Subagent also has access to information on processors and memory stored in the

System Management BIOS (SMBIOS) tables.


In addition to responding to SNMP GET requests, the Intel® SNMP Subagent generates TRAPs.

While one component of the Intel® SNMP Subagent waits for SNMP requests from the SNMP

Master Agent, another component of the Intel® SNMP Subagent monitors the System Event Log

(SEL). Entries are placed in the SEL when significant events occur on the server, such as when a

temperature sensor’s reading exceeds a threshold, or when a power supply is removed. When a

new SEL entry is detected, the Intel® SNMP Subagent analyzes the SEL entry and sends SNMP

TRAPs to the SNMP Master Agent. The SNMP Master Agent duplicates and transmits the SNMP

TRAP to all nodes that are configured to receive traps from the managed server. You must

configure trap recipients as part of installing and configuring the SNMP Master Agent.

Features of the Intel® SNMP Subagent

Through basic SNMP GETs and TRAPs, the Intel® SNMP Subagent provides the following

functionality for managing servers:

• Accessing sensor data

• Viewing and modifying threshold settings

• Reading the SMBIOS tables

• Providing overall system health status

Accessing Sensor Data

The Intel® SNMP Subagent accesses management information through IPMI commands that the

BMC on the managed server responds to. The information available varies by platform. For

example, some servers don’t support chassis intrusion detection, and some don’t support server

monitoring of redundant fans, although individual fans are monitored. The Intel® SNMP Subagent’s

Management Information Base (MIB) is designed to support the following list of components:

• Voltage

• Temperature

• System Fan (includes redundancy)

• Memory

• Processor

• Power Supply (includes redundancy)

• PCI Hot Plug Events

• Chassis

Events are generated by the SNMP agent based on SEL events and provide as much information as

possible concerning the event to the event reader. The events use the NOTIFICATION-TYPE

construct specified in SNMPv2C.

The SNMP agent is designed to accommodate the full range of possible events, although specific

server platforms may not support all of the events. Some server platforms do not support certain

features in firmware. Also, some server platforms lack some sensors or the right sensor types to

support a feature.


Displaying System Health Status

The Intel® SNMP Subagent provides system health status (“Ok”, “Non-critical”, or “Critical”)

based on the health status of the following hardware subsystems:

Sensor Sensor Health Status System Health Status

Voltage

Temperature

Fan

Ok Ok

Non-Critical Non-Critical

Critical Critical

Processor Ok Ok

All Errors Critical

Power Supply

Power Unit

Ok/Redundancy regained Ok

Error/Redundancy lost Critical

PHP Slot OK/Power On/Power Off OK

Fault Critical

Memory Array

Memory Device

Ok Ok

Single-bit Error Non-Critical

Multiple-bit Error Critical

Chassis Chassis Ok Ok

General Chassis Intrusion Critical

Changes to the overall health are triggered by SEL events, which alert the Intel® SNMP Subagent

that an event has occurred that might impact the current overall health status of the server.

Intel® SNMP Subagent Configuration Files

Linux* Operating System Configuration Files

• snmpd.conf – for the master agent

• snmpsa.conf – for the subagent

After installing the subagent, both configuration files are located at /usr/local/snmpsa/conf on the

system (Red Hat Linux*). The snmpd.conf file is a sample configuration file that includes lines

necessary to configure the master agent to properly recognize the subagent. Use these sample

configuration files as an example for editing your system’s configuration files.

Linux* SNMP Command-Line Options

You should use the ‘start’ option the first time the subagent is loaded or right after the server boots.

The Intel® SNMP subagent requires that the IPMI driver be started.

To start the IPMI service

Enter “modprobe ipmi_devintf” and “modprobe ipmi_si” in a linux terminal

*These commands works only if the openIPMI package has been installed in the OS.


• Stop the subagent by entering the following command:

/etc/init.d/snmpsa stop or systemctl stop snmpsa (for RHEL7, RHEL 7.1 & SLES12)

• Restart the master agent by entering the following command:

/etc/init.d/snmpd* restart or systemctl restart snmpd (for RHEL7, RHEL7.1 & SLES12)

• Start the subagent by entering the following command:

/etc/init.d/snmpsa start or systemctl start snmpsa (for RHEL7, RHEL7.1 & SLES12)

*If snmpd file is missing in the path /etc/init.d for Linux OS (esp if RHEL 7 and above) please use “systemctl restart snmpd” or “service snmpd restart” commands in linux terminal.

Restarting SNMP Agents

If the Intel® SNMP Subagent or Master locks up, you must restart both agents. Use the following

steps from the command line to restart the agents, depending on your operating system. For

information on setting services or daemons to start at system boot, see your operating system

documentation.

Linux* Operating System

• Stop the subagent by entering the following command:

/etc/init.d/snmpsa stop or systemctl stop snmpsa (for RHEL7, RHEL 7.1 & SLES12)

• Restart the master agent by entering the following command:

/etc/init.d/snmpd* restart or systemctl restart snmpd (for RHEL7, RHEL7.1 & SLES12)

• Start the subagent by entering the following command:

/etc/init.d/snmpsa start or systemctl start snmpsa (for RHEL7, RHEL7.1 & SLES12)

*If snmpd file is missing in the path /etc/init.d for Linux OS (esp if RHEL 7 and above) please use “systemctl restart snmpd” or “service snmpd restart” commands in linux terminal.


Uninstalling the Intel® SNMP Subagent

To uninstall the Intel® SNMP Subagents on a Linux* system, run the uninstall script installed with

the Intel® SNMP Subagent:

snmpsubagent_uninstall.sh

Or

To uninstall the Intel® SNMP Subagents on a Linux* system, run the uninstall script installed in

/usr/local/snmpsa/bin

uninstall.sh

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